PenciDesign Supporter replied
Staff Reply
Hi,
This issue is caused by the Query Monitor plugin and W3 Total Cache. The Query Monitor needs to bypass the cache to check the queries on your site, which results in this notice.
If you are not a developer or do not have a deep understanding of query notices and control, I recommend deactivating the Query Monitor plugin, as it can slow down your site.
Regards,
PenciDesign.